Sound locating apparatus



May 9, 1933. 1l Q KARNES 1,908,022'

SOUND LOCAT ING APPARATUS Filed Nov. 2, 1931 "INI/ENTOR. Jamas. I:Kam-LEE f@ BY M/m ffy/M ATTORNEY Patented May 9, 1933 JAMES C. KARNES,OF BUFFALO, NEW YORK SOUND Locarrive APPARATS Application filed November2, 1931. Serial kNo. 5,727,544.

(GRANTED UNDER THE ACT or Manen s, 1883, As AMENDEnAPRrL' so,1 '1928;.37o o. 7 5?) i The invention described herein may be manufactured andused by or for the Government for governmental purposes without thepayment to meot' any royalty thereon. e This invention relates to asound locating apparatus of the type operating according to a system ofbinaural comparison in which the apparatus is directed at the source ofsound and the listener reduces the phasediiierence l to Zero. 1

Such apparatus, as disclosed for lexample in Patent No. 1,7 7 4,826 ofSeptember 2, 1930, includes two pairs of horns arranged'on intersectingbase lines to respectively afford l lateral and vertical'impressions ofdirection in azimuth and inl elevation.

The purpose of the present invention is to effect a reduction in thesize and weight of the apparatus by eliminating one of the tour d@horns. One of the lateral horns is common to both the lateral andvertical sets and in a modification each of the lateral horns may begrouped with the vertically spaced horn.

M With the foregoing and other objects in u View, the invention residesin the novel arrangement and combination of parts and in the details ofconstruction rhereinafter described and claimed, it'being understoodthat changes in the precise embodiment of the invention hereindisclosedmay be made withinV the scope of what is claimed withoutdepart.

ing from the spirit of the invention. n

A practical embodiment oi the invention is illustrated in theaccompanying drawing, wherein:

Fig. l is a View in front elevation, partly in section showing theimproved apparatus pointed at zero elevation.

Fig. 2 is a View in side elevation thereof.

Fig. 3 is a longitudinal sectional View of the horn support. l Figs. 4and 5 are diagrammatic views illustrating methods of pairing the horns.

Fig. 6 is a view in front elevation of the horns and their support andshowing a modiiied arrangement.

Referring to the drawing by characters of reference. l

The apparatus comprises amount in which a base 5 rotatably supports atop carriage 6 top carriage and having al gear 9 meshing on the support12 isv actuated by wormlgear- 60 ing lcarried bythe top carriage andprovides means whereby the supportV is rotated about its axis. 'f 'f' fY, y An arm 16 is fast onthe center of the'support and is positionedperpendicularthereto at a point midway between the arm 7 Vofthe, top'carriage as shown in F ig. l or at one end of the support 12 as shownin Fig. 6.'

A pair of horns A and B arranged in 9 parallel relation are carried ontheleXtremi- 70 ties of the support'. on the side opposite tothe arm 16.The horns are each attached to the support by meansrof a bracket 17whose length is so determined that the -horns A and B will becounterbalance the arm 16 and i375 horn C on the extremity thereof- Thetrunnion members are hollow and while they may be utilized to forma partof the'horns as taught by the prior arty they are Y preferablyfemployedVas a casing orhousing EA f i for-flexible sound conducting'tubesa-b-cleading respectively Vfrom thehorns A-B4C and passingthroughanVapertu-re 16a-in the arm 16. As'shown in' Fig. 4 the tubesa-b areconnected to the head set 18 of the azilr85v muth listener, and -one ofthem, in the present instance the tube a is divided so that one V.of thebranches is available for pairing with the v tube c on the head set 19for the verticalV or elevation listener. As shown in Fig. 5by H0 alsodividing the tubesk Z) and c, a third grouping b-cris availablefor aheadset 20 -ofpa i third listener who has' an opportunity to y check orlisten for signals; The group b-c combines the lateral separationbetween the 595 horns of theazimuthlistener with the vertical separationbetween the horns of the eleva- 'Y tion listener. y

As seen in Fig. 1 the horn'C is of the type i y i shownin Patent No. 1,758,393 of May 13,5136V 1 are provided.

1930, in Which increased directivity is obtained by providing aneccentric throat 21 and a plane inner side 22 adapted to loaienon-frontal sound Waves. The horns A and B are each provided With theplane inner side 22 but since one or the other of them is additionallypaired with the horn C, the side 23 nearest to the horn C and Whichconstitutes the inner side of the vertical or elevation group islikewise a plane surface. The position of the throat 21, looking intothe horns A or B therefore at one corner.

I claim. Y Y

l. In a sound apparatus, a mount, a support trunnioned on the mount,spaced horns carried by the support, means for coupling said horns forma sound receiver set, an arm tastion the support at one end thereof andperpendicular thereto, a horn on said arm means' for coupling said hornto'each of the spaced horns to fornipsound receiver sets.

2. In a sound apparatus, a mount, a supporttrunnioned on the mount,spaced horns carried by the support, means for coupling said horns toforni a sound receiver set, an arm fast on the support and perpendicularthereto, a horn on said arm and means for coupling said horn to each ofthe-spaced horns to form sound receiverl sets.

3. In a sound apparatus, a mount, a support trunnioned on the mount,spaced horns carried by the support, means for coupling said horns toforni a sound receiver set, an arm fast on the support and perpendicularthereto, a horn on said arm and means for coupling said .horn to one ofthe spaced horns to formy a sound receiver set.

4;. In a sound apparatus, horizontally and vertically spaced soundreceivers arranged on intersecting basel lines, and means for couplingone sound receiver from each baseline into a sound receiver set.

51. In `a sound apparatus, three sound receivers arranged on tvvointersecting base lines and means for coupling each sound receiver withthe `remaining sound receivers whereby three separate sound receiversets 'JAMES o. KARNEs

